Extrusion press



Sepit. 21, 1948. A 1 HSTON 2,449,652

EXTRUSION PRESS Filed 001'.. '29, `1.945

'(95 `INVENTOR.

ALLEN L. HESTON m 'uw ATTORNEYS Patented Sept. 21, 1948 `Ex'rnUsIoN rness Allen L. Heston, kron,

, Rubber Machinery Company, Akron,

corporation of )lio Ohio,` assigner to National Ohio, a

Application October 29, 1945,` Serial No. 625,363

` (C1. isi- 12) Claims.

1 rI'his invention relates as indicated izo-extrusion presses and more particularly to the typeof press in which the extrusion screw carries a point at its forward end which requires to be maintained in predetermined axial relation with. respectto the orifice through which the work material is extruded. I

Due to variations in the ,character of the material being worked upon, variations in the character of the desired product, variations intemperature, and other factors such as wear, it is frequently necessary tomake adjustments of the extrusion screw with respect to the .extrusion orifice. inasmuch as the axial thrust'on the extrusion screw is required to be carried by a substantially rigid vaxial thrust bearing, `there-has been considerable difculty in providing means for the ready axial adjustment of the extrusion screw. I I

It is a principal object of the present `invention to provide an extrusion press in which the extrusion screw may be adjusted with respect to the extrusion orifice by means which are always readily accessible,` and for the operation of` which means there need be no disassembly of anyof the 1.,

other parts of the machine.

Other objects tof the invention will appear as the description proceeds.

To the accomplishment of the foregoing` and related ends, said invention then comprises the c features hereinafter fully described andparticularly pointed out in the claims, thefollowing description and the annexed drawing setting forth in detail certain illustrative embodiments of the invention, these being indicative, however, of but a few of the various ways in whichthe principle of the invention may be employed. I In said annexed drawing: I Fig. 1 is aside elevation partially in sectionv of an extrusion press incorporating theprinciples of my invention; i v y.; a I,

Fig. 2 is a plan View of the right-hand end of the extrusion screw assembly as viewed in Fig. 1 drawn to an enlarged scale; and i. 1

Fig. 3 is a transverse sectional view ofthe structure illustrated in Fig. 2 taken ona plane substantially indicated by the line 3--3. .-l r i,

Referring now morespecically to the drawing and more especially to Fig. 1, the machine here illustrated comprises a base or body portion generally indicated at I on which is supported a head generally indicated at 2 which houses `the extrusion mechanism. The head 2 is provided in a lateral extension thereof with an extr-usionlchamber 3 whichisprovldedwith a cored-jacket `Il,

`through which may be circulated a temperature modifying medium for the purpose of providing the proper temperature to the work material which is caused tomove through the chamber 3. Positioned at the end of the extrusion head is a die member 5 provided with an extrusion orifice l preferably in axial alignment with the chamber 3.

Rotatably supported in the head in a manner hereinafter more particularly explained is an extrusion screw. assembly with which my inven tion is `particularly concerned.` The screw assembly comprises an extrusion screw having a forwardly extending screw part 1, agauging point @and a guiding portion il. The outside diameter of the screw portion 1 is substantiallyequal to, the inside diameter of the chamber 3 so that as material to be worked upon is introduced into the hop-per Ii)` and the screw rotated, the latter will move such material .through the chamber 3 where the temperature thereof will be suitably modified and then ejected through the orifice 5 in a form determined largely by the relative position between the point 8 and the walls of such orifice. y

Point 8 is conical and is substantially complementary to the walls of the die 5 leading to the orifice E. It will be apparent that for the best operation of the machine and for the reasons previously stated, it be'comesnecessary to accurately adjust withinrelatively narrow limits the relative axial positions of thepoint 3 and the die 5.

`In telescopic engagement with the portion ii` of the 'screw assembly is a sleeve or quill generally indicated at I I. The quill II is rotatably supported in the machine `by means of anti-friction bearingsl2 and i3. There is also` provided a collar orradial `flange Ill on the quill l I which cooperates with a xedbearing I5 on the machine to provide an axial thrust bearing for the `screw assembly. VThe quill `I`I is slidably keyed tothe guiding portion 9 of the screw and the quill II has keyed thereto a driving gear ItA which is in mesh with a driving pinion I'I carried by the transverse shaft I8 on which is mounted a pulley iii".` "Theshaft I8 isdriven by means of belts 2t trained about the pulley I9 and the driving pulley 2 I whichis fixed to a motor shaft 22.

As most clearly illustrated in Figs. 2 and 3, the screw includingtheforward portion 'I, as well as the guiding portion 9, is tubular so as to permit the circulation of a temperature modifying .medium therethrough. The rear end ofthev quill I I is externally threaded and has threaded therecna nut 23. The nut 23 is provided with an vOpening 24 inwhich ispositioned a thrust block 25, the rear face 26 of which bears against the rear wall of the slot 2li, land the front face 21 of which is shaped to closely embrace the rear end of the guiding portion 9 of the screw. The nut 23 in the area where it is in threaded engagement with the threaded end of the quill l I is provided with a saw` slot 21, on theA opposite sidesof which are Vlugs 28 and 29 for thefreceptionlofa screw 3a by which the nut may be clamped onto the threaded end of the quill H to prevent rela-- tive rotation therebetween after :appropriate adjustment has been made.

The rear end of the nut a polygonal extension 3| for adjusting wrench. Opposite faces of the extension 3| are provided with recesses 32 whereby 23 l is .provided with the nut may be engaged by meansof a'ispanner4 theireception ofi an..

having a rear end terminating without said machine body, an axial thrust bearing on said quill adapted to engage said fixed bearing, and means in engagement with the rear ends of said quill and guiding portion of said screw member for adjustably securing said quill and screw member in,desired.. axial relationship, whereby the positionlofi the: forward endfl: of the working portion of'said screw may be adjusted axially with respect to said orifice, said last-named means comprlsing a nut having threaded engagement with the-rear end of said quill and formed with an inturned flange portion engaging the rear end l v of'theguidegportion of said screw member.

wrench to facilitate rotation of the nut withrespect to the quill l l.

Extending through an opening 33 in the end ofithej'nut is a tub'e 34;,the'forward' end of which is threaded so as to have close tting engagement with rthe threaded mouth' of the opening `into the guiding portion 9` of thescrew. Thescollar* 25A is provided with a handle 3.5l by "which the vcollar 25 may be manipulated during, assembly-and disassembly of the machine.'

When itis 'desired' to' adjust the' relative'axial position of the point-8`with respect tothe orice Bgthe nut 23; is adjustedon the end of-the quill Il to such a position'asto bringabout'the desired adjustment of Athe point 3. Itwill be observed* that these adjustments may-b'e'ma'de vwithout requiring a disassemblynofianyjo'f the.

remaining portions of the machine.`

Other modes of applyingthe" principle of the invention may be employed; change being made as regards the vdetailsdescribed,v providedlthe .'.BLIh aniextru'sion press, the combination with av'maohine body provided with a cylindrical chamber-terminating'in yan extrusion orice, and a bearingrxed with respect to the position of said orifice, of an extrusion k.screw assembly rotatably supported by said machine body, said assembly comprising af screw Aprovided with'a working portionextendinginto' said chamber and a guiding portion'V havinga rearend terminating without saidA machine body, aA driving lquill slidably keyed onsaideguiding@ portion and likewise having a rearfend"terminating-without said machine body, an axial thrust bearing, on said quill adapted to engagevsaidixedbearing, and means in engagement with the=-rear ends-ofsaid quill and guiding portion of'saidserew member for adjustably securingsai'd iqui'lfl lahdfscrewimember lin desired vaxial relationship, whereby the position of the for- -wardf-en/dof the working-portion of said screw mayIbeeadjusted axially with respect to said orific'e; said vlast-'namedimeans comprising a nut features stated vin anyv` of 'the-following claims.; or. c

@fopen-ingleading-totheaforesaid space, and a theequivalent of "such be employed.Y Y

I, therefore, particularly' point out and' distinctly claim as myinvention'z- Y 1. In an extrusion press, the combination Awith a machine body. provided with a cylindrical chamberterminatingin an extrusion orice, and a Ybearing xed with respect to vthe, position otsaid orice, of lan yextrusion screw. assembly, rotatably supported'byv said; machine body, said. assembly comprisinga-screw providedwith a working portion extending intosaidcl'iamb'e'r andra guiding portion having a, rear, end terminating. without saidmachine body, a .driving quill slidably keyed on said guiding portion and likewisehaving ya rear endfterminating Without-saidmachine body, .,155

an Yaxial thrust bearing. on said'quilladaptedto engage said xedbearing, and means in engagementwith the reanends ofQsaid quill and 'guiding portion of said .screw member for adjustably securing said quillgand'fserew. member in desiredi axialv relationship,r wherebyY the 'position ofj the forward end ofthe workmgportion 4of saidgscrew may beadjustedfaxially withrespect to said orllice..

2; In an extrusion press, the. combination with: a :machine body provided .witha cylindrical chamber terminating in. anA extrusion orice, and. a bearing` fixed with with 'respect' toltheposition ofi said orice, of, an'. extrusion, screwassembly rotatably"supported` bysa-idmachinebody, saidl assembly comprisingl a screw provid'edf'with a working portion extendingfintoffsaid'chamber and al guidingfportion having? af rear end terminating without said machine body,.a' driving'quill slidably keyed on said guidingfportion: and'flike'wise having-*threade'dengagement with the rear end of safidi quill'- and formed f withl an inturned flange spafe'edfrearwardly ofthe rear end ofthe guide portion of said screw member and a side wall thrustf block in-saidfnut inserted through such opening havingitsopposite ends in engagement witl'iffsaidlangefandfthelrear end of the guiding porti-on of "said i screw member.

j"ifIi an extrusionpress; the `combination with a machine body provided 'with aicylindrical chamfberg'andia'b'earingfxed on said body',` of an extrusion screw assembly rotatably-supported by fsaifdtmaeliine body;` said-assembly comprising a i sere-vif` provided with ai-working portion extending into 1saidcl'iamber andia` guiding portion, a driving: quill `slidably:keyed on said guiding portion, an axial thrust lbearing Ion 'said quill adapted to engage-said-xed bearing, and means in engagemientk with-theendfofsaid'quill and the end of thlefgurditrgt portion :of 'said'screw `member for adjustably securir'rgisaidquilland screw member in desired axial relationship, said last named means comprs'ingfawnut tlireadably securedv on said quill i arrdadapted 5to. engage the rear end of the guiding portion of said screw, and said nut provided with means; Or'SeCIIriIrgf? aconduit in predetermined relation tothe rear'iendofsaid screw member. 5. Inan extrusion press, the combination with afmachine body provided witha cylindrical charnbe'r termlnatlngfin'- an extrusion orifice, and a bearing Iixedf'withwrespectfto the position of said f oriflce; of f an Aextrusion screw assembly rotatably supported' b'y said machine` body, said assembly comprisiigeajsrew provided with aworkingrportionexteiidinginto said chamber and a guiding portion, a-f'drivingfquill slidably keyed on said guiding portioniintermediately of itsfends, an axial thrust?" bearing' vonv said quill adapted to engage 'sa-idzfxed b'earing, means for driving said quill,

and means in engagement with the end of said quill and the end of the guiding portion of said screw member for adjustably securing said quill and screw member in desired `axial relationship, whereby the position of the forward end of said screw may be adjusted axially with respect to said orifice, said last named means comprising a nut threadably secured on said quill and adapted to engage the rear end of the guiding portion of said screw, and said nut provided with means for securing a. conduit in predetermined relation to the rear end of said screw member.

ALLEN L. HESTON.

REFERENCES CITED Number Number UNITED STATES PATENTS Name Date Sault Dee. 9, 1862 Auchu Mar. 10, 1908 Spencer Apr. 6, 1909 Stimpson Nov. 24, 1931 Johnson June 6, 1933 FOREIGN PATENTS Country Date Great Britain 1862 

